PortName is requeried for Multi-port Services

[kulukami]

Is your feature request related to a problem? Please describe.

container.ports [] set multiple ports in service_manifest.yml, but only first one 5003 shown in k8s control dashboard.

Here is the scaler kubernetes_ctl.py, it parse spec.container.ports as a list[int]

service.spec.ports = [V1ServicePort(port=int(_p)) for _p in spec.container.ports]

But as k8s docs describes:

Multi-port Services
For some Services, you need to expose more than one port. Kubernetes lets you configure multiple port definitions on a Service object. When using multiple ports for a Service, you must give all of your ports names so that these are unambiguous. For example:

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app.kubernetes.io/name: MyApp
  ports:
    - name: http
      protocol: TCP
      port: 80
      targetPort: 9376
    - name: https
      protocol: TCP
      port: 443
      targetPort: 9377

Describe the solution you'd like
A update for odm.module of DockerConfig ports like the k8s ports: V1ServicePort

Or simply adding name for each port while creating k8s pods in scaler kubernetes_ctl.py,

service.spec.ports = [V1ServicePort(port=int(_p),name="port_{}".format(spec.container.ports.index(_p))) for _p in spec.container.ports]